Ext.onReady(function() {

	var btn = Ext.get("btn");
	btn.on('click', function() {
		Ext.create('Ext.window.Window', {
			title: '弹出窗口U',
			height: 200,
			width: 400,
			layout: 'fit',
			icon: '/js/extjs/resources/image/flag_white.gif',
			scroll: true,
			modal: true
		}).show();
	});
});